/**
* Validate the input value and set the value of @see validPattern if the input machtes a pattern
*
* @param string $value The format string to validate
* @param null $context The form context (ignored)
*
* @return bool True when the input is valid, otherwise false
*
* @see Zend_Validate_Abstract::isValid()
*/
public function isValid($value, $context = null)
{
$this->validPattern = false;
if (!is_string($value) && !is_int($value)) {
$this->error('INVALID_TYPE');
return false;
}
if ($this->isUnixTimestamp($value)) {
$dt = DateTimeFactory::create();
$dt->setTimestamp($value);
} else {
if (!isset($this->patterns)) {
throw new ProgrammingError('There are no allowed timeformats configured');
}
$match_found = false;
foreach ($this->patterns as $pattern) {
$dt = DateTimeFactory::parse($value, $pattern);
if ($dt !== false && $dt->format($pattern) === $value) {
$match_found = true;
$this->validPattern = $pattern;
break;
}
}
if (!$match_found) {
$this->_error('NO_MATCHING_PATTERN');
return false;
}
}
return true;
}
/**
* Validate filtered date/time strings
*
* Expects one or more valid formats being set in $this->patterns. Sets element value as Unix timestamp
* if the input is considered valid. Utilizes DateTimeFactory to ensure time zone awareness.
*
* @param string $value
* @param mixed $context
* @return bool
*/
public function isValid($value, $context = null)
{
// Overwrite the internal validator to use
if (!parent::isValid($value, $context)) {
return false;
}
$pattern = $this->dateValidator->getValidPattern();
if (!$pattern) {
$this->setValue($value);
return true;
}
$this->setValue(DateTimeFactory::parse($value, $pattern)->getTimestamp());
return true;
}
